Attachment-plug fitting.



F. V. BURTON.

' ATTACHMENT PLUG FITTING.

APPLIUATION FILED 1330.3, 1912. l

f,@73,955. Patented Sept. 23, 191k.

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i.iiv'lillt'. l?. BUH'IUN, OF BRIDGPORT, CONNECTCUT, ASSIGNOR T0 THE BRYANT '.EEG- Titti@ UOTttPANY, l. BRIDGIET, CNNIGTICUT, A. CORPORATION OF CONNECTICUT.

n'mncinmnmmo FITTING.

Specification ol' Letters Patent.

Pat cni'cd Sept. 23, i 9 [3,

.Application illerl Dccember 3, 1912. Serial No. 734,700.

laohnieutplug fitting and particularly-to a.

plug` adapted to be combined Wit-h various oiilletfittings ot standard type, especially switched fittings, the object of my invention being lo provide a device of novel and ctticicut utility and construction.

. ln the accompanying illustrative embodiincnls oi' my invention, Figure l is a broken elevation partially in section of a combined ')lng' and pull socket, the Section through the plugl portion boing; taken on the line 1mi, Fic'. 2;ll`ig. 2 is a'plan ot the plug,y nlonc; llignl is a section on the line 2v2, Fig. 2; Fig. et is a broken perspective ot thc cap oi the plug; Fig. is an elevation ot' a combined plug and key socket parlially broken away to show the lulching elements on the socket shell; and 'Fig'. 6 is a similar View ot a combined plugp und switched rosette.

'there a re many instances ot' installations in which outlets 'nre provided without switchci-wto control the circuit lapped oli' by plug' or nl-hcrn'isc nl` the oul'lel itl'ing. ln such cases, it the tapped circuitI is to be indepcndcntly controlled, a switch must be installed al'` soule point therein and this is usually i-irraini'cd nl; the point at which thc circuit is to be used, as for instance at a light. VUnder certain circumstances it is preferable to control the circuit at the outict and the present device renders this pos sible in en installation ofthe type referred lo, by providing' a plug fitting which coin prises. in combination with the plug, any one ot various standard switched fittings, sonic ot which are illustrated herewith.

The present plug; which is here shown ns n screw plug', has a body comprising' tivo buttons olf insulating' material il. :1nd l. united by 'n central bolt ll), the head of which. `with its washer ll, 'terms the center conlact nl the plug'. A screw shell 1Q surrounds thc lower hillton il, while u flange 'll projecting inwardly over the upper face. *t of the hutlou is clan'iped between the latter and the lower face of button A when lhc screw bolt is tightened. The upper face of thc button is recessed to receive terminal plates 14 and l5 each with its binding; screw 16 and 17 respectively and separated by the barrier. 28. The center contact screw liollI 1Q is threaded into the plate 14, while electrical connection. is established between plate' 15 and the screw shell 12 by a short screw 18 passing through the ear lll ond the (lange 13 and screwed into a threaded 'pen` foration in the plate l5.

nsteud of the usual closure-cap for the h ead of the plug, I mount thereon a peripheral latching ring 20 held in position by oil set lugs 21 let into recesses in the upper vface of the button A and enga d by screws 2li-30 passing up through tiis lalter. In the form shown this latching riiuz' comprises a plain finishing ring;7 the cdgwI ot which are spun over` a corrugated inncl` ring provided with a series of perforatioue Q52 to engage coperating latching element: on the shell of the coperatin outlet membcr after the manner of lutciing clement#A on thcsockct cap. Shown in the Goodridcje 'Patent No. 958,626.

In theconibinalion illustrated in Fie. l a pull sockel; ot any suitable type and pri vided with a shell having,`r latehing elements` to cooperate with those of the latchingf,l ring'.' 20 is shown in `position to be assembled with the lug. Conductors 23, 2l are shown eleclrical y connecting the terminals 1li and i7 on the plug with the terminals 25, l on the socket, and the current in the lutter is controlled by any suitable switch mechanism of the pu l type operated by the chain QT. lVhcn the socket has been pressed down upon the plug and thc copcrating lntchiinf elements engaged, as illustrated in Figs. Il and l, the combined fitting is ready for installalion. Obviously by screwing the pluier home in :i suitable plug receptacle, an outlet is all'oidcd by. the usual contacts of thc socket, the circuitl through which is controlled by the pull switch in Well under- `stood manner. l

ln Fig. the construction of the pini; is lhc saine. but u key, instead otI4 a pull, socket is shown assembled therewith. Fili in Fig. ll while the construction o'f the plugr is the same, the switched rosette here sho` n assembled therewith affords an outlet ol different type, but the tapped circuit is conlill Ted" 4 holleble bya, 'swieh :iithe tap in like mant.lieixiselee, by ,which the same iesult may T claim ai; my invention if.' in attachment plug ituig comprising a. plug elemen.; having plug and outlet 'termiuals, together with e, member on eeicl plug comprising a ling having a series or 'leichiug elements formed tlieleon, and oil-` Cet lugs for securing said ring to the heed 'jef the plug.- .e 2. An attachment. plug iii-ting com rising lug element-having plug ami out et ter iumels, a letehing icing with lugs for securing the same op. the heed of the plug, end

Lowes-35 beriies'on the head ei the plug separating the ouiiet terminale from each other end from seid ring-securing lugs..

ii Au attachment plug itting compiieiiig a plug membehaving plug terminals ou its entering emi ,and latcliing elemens on its outer end, un independent outlet member with iatching elemenizs adapted teccperate with those on the plug, and contacts on the juxtaposed ends of the plug and outlet members electrically connected iii the assembled fitting, for the purpose described.

ln testimony whereof have Signed my nome to this specification, in the presence of two'subseii-bing witneseea VFRA gli V. BURTON.

1V'Viii'iesees: l

GEORGE THoMAe, H. M. Wmimiz'fr. 

